Miner&#39;s safety-lamp.



PATENTED MAR. 5, 1907. B PIBPENBRING MINERS SAFETY LAMP.

#PPLIOATION FILED JUNE 22,1905.

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No. 846,050. PATENTED MAR. 5, 1907.

E. PIEPBNBRING.

MINERS SAFETY LAMP.

APPLICATION FILED JUNE 22,1905.

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PATEN S]; MAR. 5, 1907.

E. PIEPENBRING.

'MINERS SAFETY LAMP:

APPLIGATION FILED JUNE 22, 1905 4 SHEETS-SHEET 4.

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UNITED STATES PATENT OFFICE.

MINERS SAFETY-LAMP.

Specification of Letters Patent.

ratentecl March 5, 1907.

Application filed June 22,1905, Serial No. 266,380.

To all whom, it may concern:

Be it known that I, EMIL PIEPENBRING, a citizen of the German Empire,and a resident of Dortmund, Germany, have invented certain new anduseful Improvements in and Relating to Miners Safety-Lamps, of which thefollowing is a specification.

Ordinary miners safety-lamps present one or more perforations in thelamp-reservoir, serving partly for regulating the height of the flameand partly for kindling it, whether the ignition is effected by strikingor frictional means. These perforations in the lamp-reservoir give riseto numerous leakages; further, the independence of the regulation of theburner from the ignition is inconvenient in practice, as it is alwaysnecessary in the first place to bring the wick into position suitablefor kindling before this operation can be effected.

The present invention obviates both these defects by the employment of alamp-reser voir in one piece, by the rotation of which relatively to anouter protecting-envelop both the regulation of the burner and thekindling of the lamp are effected, and by means of this device bothoperations are rendered interdependent in the manner required byconsiderations of safety.

The novel lamp is illustrated in Figures 1 to 7 of the accompanyingdrawings. Fig. 1 shows the lamp in section in the position for kindling.Fig. 2 is a diagrammatic view of the operating parts illustrated in Fig.1, showing them laid out in a plane. Fig. 3 is a section through thelamp when ready for taking apart. Fig. 4 is a diagrammatic view of theoperating parts illustrated in Fig. 3, showing them rolled out in aplane. Fig. 5 is a partial section through the lamp drawn to a largerscale for the purpose of illustrating the arrangement of the operatingmechanism. Fig. 6 is a section through the upper art of theprotecting-envelop after the amp-reservoir has been taken out, showingthe locking mechanism fastened. Fig. 7 is a similar section showing thelocking mechanism unfastened by magnetic means. Fig. 8 is a perspectiveview of part of the lamp, showing the igniting-strip and adjoining partsand Fig. 9 is a plan thereof.

The lamp-body a, which is stamped out in a single piece, is onlyperforated at its upper part by a charging or cleaning aperture whichreceives the burner-tube c, which is soldered into the burner-plate b,which also receives the kindling-tube d. Upon the upper part of thelamp-reservoir the kindling device is fixed. It consists of acentrallyarranged guide-ring e for the kindling-band f and of theigniting-spring g, which is mounted in such a manner that theignitingpellets are caused to explode. An operating-ring h is rotated bythe stepped portion of the lamp-reservoir a by friction and carries thefree extremity of the igniting-strip f, which is firmly held therein.The outer protecting-envelop, which forms 'a tight joint with thelamp-reservoir, consists of the cylindrical part or casing i and theignitercover 1:3. This cover lc carries in its tubular addition Z aspiral spring m, which constantly presses the burner-plate upon itsseat, and thereby presses the entire lamp-reservoir downward. Thecylindrical part 71 carries upon its inner periphery the igniting andregulating cams or curves n, with the safetyfastening, which consists ofa flanged ring 7'), freely displaceable in the cylinder 11 and depressedby the springs 0. This ring p carries the bolts q, forming thecontinuation of the igniting-cams.

The lamp is prepared for use and operated in the following manner: Thefilled lampreservoir a is inserted in the protecting-casing '8, beinggiven the necessary centering by its projection 1 Its guide-studs s arebrought beneath the bolts g, and these latter are pressed upward, sothat after slight rotation the studs come upon the ignition-cams n. Thebolts again snap to under the influence of the springs 0, so that it isimpossible for any unauthorized opening of the lamp to take place. Nowif the lamp-reservoir a is rotated still further in the same directionrelatively to the protecting-casing (in Fig. 2 toward the right hand)its studs 8 will mount the igniting-cams against the pressure of thespring m, mounted on the igniter-cover 7c. The burner-tube c and thekindling-tube d participate in this ascent and reach the kindlingposition, the burner projecting considerably from the igniter-cover andthe kindling-tube coming in front of an appropriate slot 25 in thiscover. When the burner has obtained its maximum elevation, one of thepellets of the igniting-strip f is exploded, thereby igniting theauxiliary burner, which in turn kindles the main burner. For thispurpose the following construction has been devised: Shortly before thestuds 8 reach the highest point of the curves the flange of theoperating-ring h comes against the frictionplate a, which is yieldinglysupported and mounted in such a manner as to be incapable of rotationrelatively to the protecting-envelop i. In order to form a tight jointbetween the lamp-reservoir and the envelop, this plate u is providedwith an india-rubber washer '0. The lower flanged portion of this washerbears around the friction-plate u in order that owing to its highcoefficient of friction it may insure the retention of theopcrating-ring by the friction-plate, even with equal pressure betweenthe friction-plate, operating-ring, and lamp-reservoir. If desired, theupper portion of the operatingring may be roughened. Owing to thepressure exerted by the springs the operatingring will be held so longas it is within reach of the plate u. Relative displacement between theoperating-ring h and the lamp-reservoir is, however, possible, and asthe ring holds one end of the kindling-strip a pellet of this latter isexploded. Now if the duration of the contact between the operatingring 7and the friction-plate a is appropriately calculated the kindling-stripis displaced by the amount of an interval between the pellets. As aresult of this each time the summit of the igniting curves or cams ispassed ignition will take place. The kindling-spool is placed in theinterior of guidering 6, the free end of the spool passing through aslot of such ring and being clamped to ring h. If ring h is rotated inthe manner described, the kindling-strip is drawn along the outerperiphery of ring 6 and across the igniting-spring g to efiiect theexplosion of 'one of the pellets. The spark thus produced will ignitethe auxiliary burner d, which will in turn ignite the wick in mainburner c. The regulation of the length of the flame is effected by theelevation of cover lc by cams n, which also in its raised positionextinguishes the auxiliary flame by cutting off the air-supply. The lampmay be taken apart for cleaning and replenishing by lifting the magneticfastening. The small armatures w, fixed upon the flanged ring, arelifted by the application of an appropriatelyformed magnet against theinfluence of the springs 0, and thereby lift the bolts q out of theigniting-curves. By this means the studs 8 are able to descend, and thelampreservoir a may be withdrawn from the envelop i. When assembled, thelamp is protected from any unauthorized opening.

What I claim is 1. In a safety-lamp, a reservoir, a main burner, anauxiliary burner and an igniter mounted upon the reservoir, combinedwith a casing adapted to be rotated and reciprocated on the reservoir,an ignition-strip, and means intermediate reservoir and casing fordrawing said strip across the igniter, substantially as specified.

2. In a safety-lamp, a reservoir, a main burner, an auxiliary burner andan igniter mounted upon the reservoir, combined with a casing adapted tobe rotated and reciprocated on the reservoir, a ring inclosed within thecasing and loosely mounted upon the reservoir, an ignition-strip securedto the ring, and a friction-plate on the casing adapt- Ed to engage thering, substantially as speci- 3. In a safety-lamp, an open reservoir, atop plate carried thereby, a main burner and an auxiliary burner securedto the plate, a ring rotatable on the reservoir, and an ignition-stripsecured to the ring, combined with a casing adapted to be rotated andreciprocated on the reservoir, a perforated cover secured to the casing,a spring intermediate plate and cover, and a friction-plate on thecasing adapted to engage the ring, substantially as specified.

4. In a safety-lamp, a stepped reservoir, a main burner, an auxiliaryburner, an igniter and studs secured to the reservoir, a flangedrotatable ring engaging the reservoir-step, an ignition-strip secured tothe ring, combined with a casing rotatable on the reservoir, a camsecured to the casing and engaged by the studs, and a friction-plate onthe casing adapted to engage the ring, substantially as specified.

EMIL PIEPENBRING.

Witnesses:

WILLIAM EssENwEIN, PETER LIEBER.

